/Engine/Source/Editor/UnrealEd/Classes/Editor/EditorEngine.h
Constructor that populates the set of actor names
FCachedActorLabels ( [UWorld](API\Runtime\Engine\Engine\UWorld) * World, const [TSet](API\Runtime\Core\Containers\TSet)< [AActor](API\Runtime\Engine\GameFramework\AActor) * > & IgnoredActors )